Side-head hold-over and chip-breaker-lift structure.



H. i. MiTCHELL.

SIDE HEAD HOLD OVER AND CHIP BREAKER LIFT STRUCTURE.

APPLICATION FILED cm. 6. i915.

1,205,651 1. Patented Nov. 21, 1916.

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nnrrnn STATES Parana or ies.

HARRISON MITCHELL, OF BELOIT, WISCONSIN, ASSIGNOR T0 P. B. YATES MACHINE COMPANY, OF IBELOIT, WISCONSIN,v A CORPORATION OF WISCONSIN.

SIDE-HEAD HOLD-OVER AND CHIP-BBEAKEB-LIFT STRUCTURE.

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Specification of Letters Patent.

Patented Nov. 21, 1916.

Application filed October 6, 1915. Serial No. 54,318.

To all whom it may concern: I p H Be it known that I, HARRIsoN J. MITCHELL, a citizen of, the United States, residing at Beloit, in the county of Rock and State of Wisconsin, have invented certain new and useful Improvements in Side-Head Hold- Over and Chip-Breaker-Lift Structures, of which the following is a specification.

In woodworking machines employing side-heads for planing the edges of boards, it hasbeen customary to use chipbreakers or board-holding devices, but experience has shown that, particularly with arapid feed of lumber, such chipbreaker is likely to be struck a sharp blow by the entering board, especially when the front end of the board recedes or backs away from the side-guide as it is being advancec.

One of the prime aims of this invention is to provide means to hold the board over properly against the guide or gage and to relieve the chipbreaker from the shock incident to the engagement of the board therewith, such means being constructed to receive and reduce the jar produced by the board strikingit. With this and other objects in view, I have devised structures for accomplishing these purposes, and inthe accompanying drawing.- forming a part of this specification, I have illustrated a deslrable embodiment of the invention.

In this drawing, Figure 1 is a fragmentary plan view of the improvedappliance with the chipbreaker hood shown in section, and Fig. 2 is a vertical section on line2+2 of Fig. 1, the parts being viewed in the direction indicated by the arrows:

In this construction, thetwoxplaning' sideheads are supplied with the reference characters l0 and 1-1, the machine being equipped with the usual cut-bars 12, '12, and the side'- guide 13, on which is adjustably mounted the nose-piece or bar-before-cut lat.

On the side of the machine opposite the guide or gage 13, a chipbreaker hood 15 is hinged at 16 on any suitable part of the machine, such hood having tlielusual; aperture 17 for the discharge of the shavings. At its end the hood or cover has two outstandingspaced ribs 18 and 19 between which the reduced shank 20 of a'chipbreake'r 21 is accommodated such shank being hinged or pivoted tothe ears 18 and 19 by means of a hinge-pin 22. The upper-rib 18 is slotted at 23,"the slotreceiving a' screw Qisecured to the chipbreaker shank, and by means of which the angular position of the chipbreaker with reference to the hood may be adjusted.

At 25 a link Q Gis pivoted to the chipbreaker and is disposed beneath it as illustrated, the free end of the link carrying a roller 27 freely revoluble on a stud 28 and. adapted to engage the edge of the incoming lumber and hold itover against the guide, as well asconstituting a lift device or shifter tor the chipbreaker.

The shank 20 of the chipbreaker has an ap ertured car 29 through the hole of which extends an eye-bolt 30, the eye end of which fits over a pin 31 carried by the link and extended downwardly through perforated bosses 32 and S3. The protruding end of the bolt is equipped with a nut 34 and its associated lock-nut 35, the former constitutinga stop or limiting device adapted under certain conditions to engage the adjacent face of car 29. This ear has a depending lug 36 intended to cooperate with the edge of link 36 and constitute a companion stop for the appliance.

To the lower end of pin 31 a chain 37 is fastened in any approved manner, such chain passing over a sheave and bearing a weight tending to pull the parts over toward he work, that is, toward the elements 10, 1-1, and 13, illustration of the sheave and weight being omitted. that the pull of this chain acts both on the roller 27 and the chipbreaker, pressing both of them toward their work. It should also be observed that the roller 27 has a predetermined amount of play with reference'to the chipbreaker, the extent of such lost motion being determined bythe position of the stops 36 and 34.

In Fig. 1, I haveshown the side-heads acting on a board 38, a somewhat wider board 39 being advanced for the planing of its edges. so constructed and positioned, that, if the following board is only slightly narrower or slightly wider than the preceding board, the edge of which the chipbreaker is engaging,

the roller 27' will act to push its board over properly against the guide 13 without disturbing the position of the chipbreaker,this action being possible by reason of the limited freedom of movement of the roller with respect to the chipbreaker. Of course, when It will be I noticed The parts of the appliance are the board under the roller reaches the chipbreaker, if such board is wider than the preceding one, it will lift or shift the breaker by direct engagement therewith, permitting it to ride properly on its edge, and if such secondboard is narrowerthan the leading board, the chipbreaker will move over under the action of chain 37 into correct engagement with its edge, as soon as the breaker is free from the wider planed board.

I11 case the following board is considerably wider than the first board, in advancing, it will contact with the roller 27, which will force it over against the guide 13, but such engagement of the board with the roller will move or shift the chipbreaker away from the edge of the first board. Inasmuch, however, as the planing of that board is close to the end of the latter, no harm results, it being more important that the second board is pressed againstthe guide as it passes to the chipbreaker and side-heads. If, on the other hand, the second board is considerably narrower than the preceding one, it will be first engaged by the roller to properly cooperate with the guide 13, as soon as this action is permitted by the chipbreaker riding off of the end of the preceding board, and immediately thereafter the chipbreaker will contact with the board. It should be clear, therefore, that the roller 27 constitutes both a hold-over device and a chipbreaker lift or shifter.

It should be remembered that the device illustrated and described is merely illustrative of one way in which the invention may be put into practicable form, but it is also capable of various other embodiments working upon the same general principles and containing in general the benefits and advantages referred to.

I claim:

1. In an appliance of the character described, the combination of a guide against which an edge of the work is adapted to bear, a movably -mounted chipbreaker adapted to cooperate with the opposite edge of the work, means constructed to bear against said latter edge of the work in advance of the chipbreaker and press the work over to the guide, said means and chip breaker being adapted to co-act with the work at the same time, and means common to said chipbreaker and pressing-means acting to force both the chipbreaker and press ing-means toward the edge of the work, substantially as described.

2. In an appliance of the'character described, the combination of a guide against which an edge of the work is adapted to bear, amovably -mounted chipbreaker adapted to cooperate with the opposite edge of the work, means constructed to bear against said latter edge of the work in advance of the chipbreaker and press the work over to the guide, said means and chipbreaker being adapted to co-act with the work at thesame time, means common to said chipbreaker and'pressing-means acting to force both the chipbreaker and pressin means toward the edge of the work, and means enabling said pressing-means to actuate said chipbreaker away from the work, substantially as described.

3. In an appliance of the character described, the combination of a guide against which an edge of the work is adapted to bear, a chipbreaker mounted to be capable of movement toward and from and adapted to cooperate with the opposite edge of the work, means constructed to bear against said latter edge of the work in advance of the chipbreaker and press the work over to the guide, said means and chipbreaker being adapted to co-act with the edge of the work at the same time, means supporting said pressing-means on said chipbreaker mounting and movable relatively thereto, and means common .to said chipbreaker and pressing-means acting to force both the chipbreaker and pressing-means toward the edge of the work, substantially as described.

,4. In an appliance of the character described, the combination of a movable chipbreaker, means adapted to bear against the work in advance of the chipbreaker and press'the work over to the guide, an equalizer common to said chipbreaker and pressing means, and means acting on said equalizer tending to force both the chipbreaker and the pressing means toward the work, substantially as described.

5. In an appliance of the character described, the combination of a movable chipbreaker, means adapted to bear against the work in advance of the chipbreaker and press the work over to the guide, an equal izer common to said chipbreaker and pressing means, means acting on said equalizer tending to force both the chipbreaker and pressing means toward the work, and a loose connection between said equalizer and chipbreaker, substantially as described.

6. In an appliance of the character described, the combination of a pivoted chipbreaker, an equalizer pivoted to the chipbreaker, a roller mounted on said equalizer adapted to bear against the work in advance of the chipbreaker and press the work toward the guide, and means acting on said equalizer tending to force both the chipbreaker and the roller toward the work, sub stantially as described. I

7 In an appliance of the character described, the combination of a pivoted chipbreaker, an equalizer pivoted to the chip- 'breaker, a roller mounted onsaid equalizer adapted to bear on the work in advance'of the chipbreaker and press the work over to the guide, means acting on, said equalizer equalizer adapted to bear against the Work 10 in advance of the chipbreaker and press the Work over to the guide, means acting on said equalizer tending to force both the chipbreaker and pressing means toward the Work, and a loose connection between said 15 equalizer and lug, substantially as described.

HARRISON J. MITCHELL.

tending to force both the chipbreaker and roller toward the work, and a loose connection between said equalizer and chipbreaker, substantially as described.

8. In an appliance of the character described, the combination of a pivoted chipbreaker movable toward and from the Work and having a projecting lug, an equalizer pivoted to said chipbreaker a roller on said Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). G. 

